wp-includes/rest-api/class-wp-rest-server.php:866Wraps the response in an envelope.
$responseWP_REST_Response$embedbool|string[]WP_REST_ResponseOne hook fires while WP_REST_Server::envelope_response() runs, in this order:
Filters the enveloped form of a REST API response.
public function envelope_response( $response, $embed ) { $envelope = array( 'body' => $this->response_to_data( $response, $embed ), 'status' => $response->get_status(), 'headers' => $response->get_headers(), ); /** * Filters the enveloped form of a REST API response. * * @since 4.4.0 * * @param array $envelope { * Envelope data. * * @type array $body Response data. * @type int $status The 3-digit HTTP status code. * @type array $headers Map of header name to header value. * } * @param WP_REST_Response $response Original response data. */ $envelope = apply_filters( 'rest_envelope_response', $envelope, $response ); // Ensure it's still a response and return. return rest_ensure_response( $envelope ); }Introduced in 4.4.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/rest-api/class-wp-rest-server.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.